Changes in Adenine Nucleotides of Squid Muscle

Abstract

IT was reported in an earlier communication¹ that after slow freezing of carp muscle there is a very rapid splitting of adenosine triphosphate accompanied by an instantaneous deamination, as a result of which inosine monophosphate accumulated predominantly. The mechanism of these phenomena is assumed to be that the action of adenosine triphosphatase or adenosine monophosphate deaminase is not affected by such low temperatures, while that of 5′-nueleotide phosphatase is reduced². On the other hand, we have investigated the changes of nucleotides in squid muscle under the same conditions as those described previously and the specific phenomena have been observed to differ from those of carp muscle. This will be described in the present communication.